An interesting update! Hard to say whether something on our side or theirs has changed, or if it's merely a matter of the average load coming from the UrlFetch proxies... If this rears its head again in future, I think it's worth reporting to the Public Issue Tracker <http://code.google.com/p/google-cloud-platform/issues/list>.
Cheers, Nick Cloud Platform Community Support On Sunday, May 15, 2016 at 11:55:07 PM UTC-4, Ryan Barrett wrote: > > just to follow up, instagram has evidently stopped blocking/throttling > app engine's IPs, or whatever else was happening here. i can now > successfully fetch www.instagram.com profile and photo pages from a > few different app engine apps. > > On Fri, May 6, 2016 at 1:25 PM, 'Nick (Cloud Platform Support)' via > Google App Engine <google-appengine@googlegroups.com> wrote: > > Thanks for the details! Hopefully this thread is useful to future users. > > > > > > On Friday, May 6, 2016 at 2:57:49 PM UTC-4, Ryan Barrett wrote: > >> > >> On Fri, May 6, 2016 at 9:47 AM, 'Nick (Cloud Platform Support)' via > >> Google App Engine <google-appengine@googlegroups.com> wrote: > >> > Hey Ryan, > >> > > >> > Glad to be of assistance, and I really want to get to the bottom of > >> > this. > >> > Reviewing the infrastructure used by UrlFetch, this absolutely does > make > >> > sense, when we consider this tantalizing detail from the > documentation: > >> > > >> >> The URL Fetch service uses an HTTP/1.1 compliant proxy to fetch the > >> >> result. > >> > >> yup. if urlfetch is behind a small or even medium sized set of VIPs or > >> IP blocks, and instagram rate limits their www based on IP (individual > >> or block), that's it. you could data mine urlfetch's logs and find the > >> offending app(s), if any, and play the abuse whack-a-mole game, > >> but...meh. > >> > >> > which sort of proxy configuration you're using, the type of proxy, > the > >> > average > >> > request load, etc.? > >> > >> sure! it's dirt simple, just apache mod_proxy with these lines in > >> httpd.conf: > >> > >> SSLProxyEngine on > >> <Location "/instagram/"> > >> ProxyPass "https://www.instagram.com/"; > >> </Location> > >> > >> my load is miniscule and pretty constant, roughly 1-2qm on average. > >> most of that is to profile URLs (evenly spread across ~500 users), the > >> rest to individual photo URLs like eg > >> https://www.instagram.com/p/BE4xLpmABFz/. > >> > >> i used to do 3-5x that much before i throttled down recently. i > >> haven't tried, but i expect i could ramp back up to that on the > >> reverse proxy and not get 429ed. > >> > >> > >> > On Thursday, May 5, 2016 at 6:36:12 PM UTC-4, Ryan Barrett wrote: > >> >> > >> >> thanks for going above and beyond, nick! much appreciated. i'm > >> >> currently working around it by using a reverse proxy outside of app > >> >> engine, so that my requests are charged to a different IP and > isolated > >> >> from other app engine apps. glad this info is here now for other > >> >> people too. > >> >> > >> >> > >> >> On Thu, May 5, 2016 at 2:13 PM, 'Nick (Cloud Platform Support)' via > >> >> Google App Engine <google-appengine@googlegroups.com> wrote: > >> >> > > >> >> > After some extensive testing, I've determined that the 429 you're > >> >> > receiving > >> >> > is expected behaviour from instagram, and it does relate to a > >> >> > windowing > >> >> > average, although it may not be the same as that published in > their > >> >> > documentation for APIs. After sending a few thousand requests in a > >> >> > span > >> >> > of > >> >> > ~15 seconds, I began to receive 429 responses, with some 200's > >> >> > intermixed. > >> >> > > >> >> > Cheers, > >> >> > > >> >> > Nick > >> >> > Cloud Platform Community Support > >> >> > > >> >> > On Wednesday, May 4, 2016 at 3:21:46 PM UTC-4, Ryan Barrett wrote: > >> >> >> > >> >> >> On Wed, May 4, 2016 at 12:02 PM, 'Nick (Cloud Platform Support)' > via > >> >> >> Google App Engine <google-appengine@googlegroups.com> wrote: > >> >> >> > So, you're attempting merely to fetch http://www.instagram.com/, > > >> >> >> > and > >> >> >> > you > >> >> >> > receive 429 on the first request, and you're not launching many > >> >> >> > other > >> >> >> > requests at the same time? It seems odd that a rate-limit > response > >> >> >> > would > >> >> >> > come without a condition being reached requiring > rate-limiting... > >> >> >> > Let > >> >> >> > me > >> >> >> > >> >> >> i'm actually fetching profile URLs, not the front page. eg > `import > >> >> >> urllib2; urllib2.urlopen('https://www.instagram.com/kevin/')` > <https://www.instagram.com/kevin/')> in > >> >> >> https://shell-hrd.appspot.com/ gets 429ed even though i'm not > >> >> >> fetching > >> >> >> that particular URL in any of my apps. > >> >> >> > >> >> >> it definitely seems odd, agreed. i only suspect rate > >> >> >> limiting/blocking > >> >> >> at the IP level because i exhaused the other obvious causes. i'd > be > >> >> >> happy to be proven wrong! > >> >> >> > >> >> >> > >> >> >> > know what you think in your reply. > >> >> >> > > >> >> >> > Cheers, > >> >> >> > > >> >> >> > Nick > >> >> >> > Cloud Platform Community Support > >> >> >> > > >> >> >> > On Wednesday, May 4, 2016 at 1:09:35 PM UTC-4, Ryan Barrett > wrote: > >> >> >> >> > >> >> >> >> thanks for the replies! i should have emphasized that this is > for > >> >> >> >> www.instagram.com, not the API. API requests are working > fine. > >> >> >> >> > >> >> >> >> you're right that IP blocking wouldn't usually be the first > >> >> >> >> culprit > >> >> >> >> in > >> >> >> >> general, especially for 429s. i tried from a few different > apps, > >> >> >> >> though, > >> >> >> >> including shell-hrd (log in my first post), which pretty much > >> >> >> >> never > >> >> >> >> uses > >> >> >> >> urlfetch otherwise based on its quota numbers, so i doubt it's > >> >> >> >> User-Agent > >> >> >> >> blocking. i tried an entirely new www.instagram.com URL and > still > >> >> >> >> got a > >> >> >> >> 429, > >> >> >> >> so it's probably not specific URLs, at least due to my own > >> >> >> >> traffic. > >> >> >> >> and > >> >> >> >> i > >> >> >> >> can fetch the same URL fine from my local machine. hence my IP > >> >> >> >> suspicion. > >> >> >> >> > >> >> >> >> i've already worked around this, so it's not urgent. just > figured > >> >> >> >> you > >> >> >> >> all > >> >> >> >> might want to know. thanks again! > >> >> >> >> > >> >> >> >> On Monday, May 2, 2016 at 10:52:11 AM UTC-7, Nick (Cloud > Platform > >> >> >> >> Support) > >> >> >> >> wrote: > >> >> >> >>> > >> >> >> >>> Hey Ryan, > >> >> >> >>> > >> >> >> >>> I'm unsure that this indicates that App Engine specifically > is > >> >> >> >>> being > >> >> >> >>> rate-limited. It's likely that the 429 response is directly > >> >> >> >>> related > >> >> >> >>> to > >> >> >> >>> the > >> >> >> >>> frequency with which you're making requests, regardless of > the > >> >> >> >>> origin > >> >> >> >>> of > >> >> >> >>> those requests. While not impossible, I suppose, it would be > >> >> >> >>> surprising if > >> >> >> >>> they were keeping track of App Engine IP ranges and applying > a > >> >> >> >>> different > >> >> >> >>> rate-limit, and would require some thorough A/B testing to > >> >> >> >>> prove. > >> >> >> >>> So, > >> >> >> >>> I > >> >> >> >>> recommend just checking their documentation or, if the > >> >> >> >>> rate-limit > >> >> >> >>> is > >> >> >> >>> undocumented, benchmarking to attempt to determine it, and > try > >> >> >> >>> to > >> >> >> >>> fly > >> >> >> >>> under > >> >> >> >>> it. Generally, exponential-backoff is a good tactic when > dealing > >> >> >> >>> with > >> >> >> >>> rate-limiting. > >> >> >> >>> > >> >> >> >>> Sincerely, > >> >> >> >>> > >> >> >> >>> Nick > >> >> >> >>> Cloud Platform Community Support > >> >> >> >>> > >> >> >> >>> On Monday, May 2, 2016 at 11:57:15 AM UTC-4, Nickolas > Daskalou > >> >> >> >>> wrote: > >> >> >> >>>> > >> >> >> >>>> Hi Ryan, > >> >> >> >>>> > >> >> >> >>>> It seems to be working fine for us (SocialPage.me). > >> >> >> >>>> > >> >> >> >>>> Are you accessing their API using separate access tokens for > >> >> >> >>>> each > >> >> >> >>>> user? > >> >> >> >>>> > >> >> >> >>>> Nick > >> >> >> >>>> > >> >> >> >>>> > >> >> >> >>>> On 2 May 2016 at 14:30, Ryan Barrett <goo...@ryanb.org> > wrote: > >> >> >> >>>>> > >> >> >> >>>>> hi all! just FYI, it looks like Instagram is blocking/rate > >> >> >> >>>>> limiting > >> >> >> >>>>> App > >> >> >> >>>>> Engine's IPs from fetching www.instagram.com, both > urlfetch > >> >> >> >>>>> and > >> >> >> >>>>> sockets, > >> >> >> >>>>> across apps. e.g. this session from > >> >> >> >>>>> https://shell-hrd.appspot.com/ : > >> >> >> >>>>> > >> >> >> >>>>> >>> urllib2.urlopen('https://www.instagram.com/snarfed/') > >> >> >> >>>>> Traceback (most recent call last): > >> >> >> >>>>> ... > >> >> >> >>>>> File > >> >> >> >>>>> > >> >> >> >>>>> > >> >> >> >>>>> > >> >> >> >>>>> > "/base/data/home/runtimes/python/python_dist/lib/python2.5/urllib2.py", > line > >> >> >> >>>>> 506, in http_error_default > >> >> >> >>>>> raise HTTPError(req.get_full_url(), code, msg, hdrs, > fp) > >> >> >> >>>>> HTTPError: HTTP Error 429: Unknown > >> >> >> >>>>> > >> >> >> >>>>> it's not 100% consistent - i occasionally see requests make > it > >> >> >> >>>>> through > >> >> >> >>>>> - but the majority get 429ed. > >> >> >> >>>>> > >> >> >> >>>>> not holding my breath, but i figured you all might want to > >> >> >> >>>>> know, > >> >> >> >>>>> especially in case cloud support people have lines of > >> >> >> >>>>> communication > >> >> >> >>>>> open > >> >> >> >>>>> with instagram/facebook for this kind of thing. > >> >> >> >>>>> > >> >> >> >>>>> -- > >> >> >> >>>>> You received this message because you are subscribed to the > >> >> >> >>>>> Google > >> >> >> >>>>> Groups "Google App Engine" group. > >> >> >> >>>>> To unsubscribe from this group and stop receiving emails > from > >> >> >> >>>>> it, > >> >> >> >>>>> send > >> >> >> >>>>> an email to google-appengi...@googlegroups.com. > >> >> >> >>>>> To post to this group, send email to > >> >> >> >>>>> google-a...@googlegroups.com. > >> >> >> >>>>> Visit this group at > >> >> >> >>>>> https://groups.google.com/group/google-appengine. > >> >> >> >>>>> To view this discussion on the web visit > >> >> >> >>>>> > >> >> >> >>>>> > >> >> >> >>>>> > >> >> >> >>>>> > https://groups.google.com/d/msgid/google-appengine/be7f6ead-fe34-45c4-9ee0-00956b5f89de%40googlegroups.com. > > > >> >> >> >>>>> For more options, visit https://groups.google.com/d/optout. > > >> >> >> >>>> > >> >> >> >>>> > >> >> >> > -- > >> >> >> > You received this message because you are subscribed to a topic > in > >> >> >> > the > >> >> >> > Google Groups "Google App Engine" group. > >> >> >> > To unsubscribe from this topic, visit > >> >> >> > > >> >> >> > > >> >> >> > > >> >> >> > > https://groups.google.com/d/topic/google-appengine/rpendSIxJMo/unsubscribe. > > >> >> >> > To unsubscribe from this group and all its topics, send an > email > >> >> >> > to > >> >> >> > google-appengine+unsubscr...@googlegroups.com. > >> >> >> > To post to this group, send email to > >> >> >> > google-appengine@googlegroups.com. > >> >> >> > Visit this group at > >> >> >> > https://groups.google.com/group/google-appengine. > >> >> >> > To view this discussion on the web visit > >> >> >> > > >> >> >> > > >> >> >> > > >> >> >> > > https://groups.google.com/d/msgid/google-appengine/8ef83fef-658e-48e0-a2f5-c6aee889d455%40googlegroups.com. > > > >> >> >> > > >> >> >> > For more options, visit https://groups.google.com/d/optout. > >> >> >> > >> >> >> -- > >> >> >> https://snarfed.org/ > >> >> > > >> >> > -- > >> >> > You received this message because you are subscribed to a topic in > >> >> > the > >> >> > Google Groups "Google App Engine" group. > >> >> > To unsubscribe from this topic, visit > >> >> > > >> >> > > >> >> > > https://groups.google.com/d/topic/google-appengine/rpendSIxJMo/unsubscribe. > > >> >> > To unsubscribe from this group and all its topics, send an email > to > >> >> > google-appengine+unsubscr...@googlegroups.com. > >> >> > To post to this group, send email to > >> >> > google-appengine@googlegroups.com. > >> >> > Visit this group at > https://groups.google.com/group/google-appengine. > >> >> > To view this discussion on the web visit > >> >> > > >> >> > > >> >> > > https://groups.google.com/d/msgid/google-appengine/29c32354-cc82-452b-bc8f-fc4f5a62e464%40googlegroups.com. > > > >> >> > > >> >> > For more options, visit https://groups.google.com/d/optout. > >> >> > >> >> -- > >> >> https://snarfed.org/ > >> > > >> > -- > >> > You received this message because you are subscribed to a topic in > the > >> > Google Groups "Google App Engine" group. > >> > To unsubscribe from this topic, visit > >> > > >> > > https://groups.google.com/d/topic/google-appengine/rpendSIxJMo/unsubscribe. > > >> > To unsubscribe from this group and all its topics, send an email to > >> > google-appengine+unsubscr...@googlegroups.com. > >> > To post to this group, send email to > google-appengine@googlegroups.com. > >> > Visit this group at https://groups.google.com/group/google-appengine. > > >> > To view this discussion on the web visit > >> > > >> > > https://groups.google.com/d/msgid/google-appengine/102fb6db-a520-41e0-8c2f-57d969560ad8%40googlegroups.com. > > > >> > > >> > For more options, visit https://groups.google.com/d/optout. > >> > >> > >> > >> -- > >> https://snarfed.org/ > > > > -- > > You received 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